If the administration panel's Tools -> Databases menu displays "Your database is installed, however, you have to wait a few more seconds while our DNS servers synchronize" and that your domain name doesn't point to the Infomaniak servers, the problem results from the non-use of our DNS.

In order to correct this, you need to point mysql.domain.com as a cname to mydX-YY.infomaniak.ch (info to be retrieved from the administration panel under DNS -> DNS Zone):